William h



W. H. MONRE.

WINDOW SASH LOCK.

APPLICATION FILED sEPT.13,1918.

Patented Sept. 16, 1919.

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WILLIAM H. nonnen, or ourense, rvI1;nri\ro`rs.

WINDOW-SASH LGGEK.

Y specification of Letters Patent. yatantedrsept. H16', 19.19.`

Application flied septemberis, 1791s, ,serial ,tra 253,945.

To all whom t 'may concern Be it known that I, WrLmn-M H. Monnon,

a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Window Sash Locks, of which the following is a specification.

My invention relates to improvements in window-sash locks. Y

One of the objects of my invention is to provide a sash lock that may easily and quickly be applied; that is effective in operation; strong and durable and cheaply to construct.

Other and further objects of my invention will become readily apparent to persons skilled in the art, from a consideration of the following description when taken in conjunction with the drawings, wherein Figure 1 is an elevation of a window showing the lower sash partly raised and the lock positioned to prevent upper movement of the sash.

Fig. 2 is an enlarged fragment in section showing the lock in place.

Fig. 3 is a transverse section taken on line 3 3 of Fig. 2 showing the lock in plan.

Fig. 4 is a perspective view of the lock.

In all the views the same reference char` acters are employed to indicate similar parts.

The lock is adapted for portable use or it may be inseparably attached to the lower sash of the window, by screws or the like.

Some of the characteristic features of the lock are its inaccessibility from the outside; Aits adaptability to all types of windows and the ease with which its use may be discontinued by moving one of the hinged members out of the path of the sash, and furthermore, it permits the sash to be lowered, but instantly contacts the frame in a positive manner when effort is made to raise the sash.

In the drawings 5 is a window frame, 6 is the lower sash and '7 is the upper sash. The lower sash 6 is supported upon sash cords 8.

The lock consists of two members 9 and 10, hinged together, as at 11. Each of the members is bifurcated at its end. Member 9 provides a prong 12 and a spaced apart prong 13 with an opening 14 therebetween. The member 10 is provided with a prong 15 and a spaced apart prong 16 with an opening 17 therebetween. The openings are provided to permit passage of the sash cord 8 between the prongs of the respective members. The

prongsl andi13 are bent at substantial.: right angles Vto th@ body of the member. 9

Aandare intended to engage the uppler vertical edge of the lower sash 6, as shown in Figs. 2 and 4. The prongs 15 and 16 of the member 10 are bent at an angle more acute than the prongs 12 and 13 and are bent and extended outwardly at their points, so that the salient edges 18-18 of the prongs 15 and 16 will engage the confronting edge of the sash frame 5, when the device is first set in the position, as shown in Fig. 2. When effort is made to raise the sash,`then the knee 19 of the member 10 will be brought into Contact with the inner surface 20 of the window frame, thus preventing the lower sash 6 from being raised. If effort is made to lower the sash, then the member 10 will ride with the points 18 in contact with the vertical surface of the frame 5 without bringing the knee 19 into contactwith the confronting surface ofthe frame. When it is desired to attach the device securely to the lower sash, screws may be inserted in the holes 21,l as shown in Fig. 2. It may, however, be temporarily used without the attaching screws, the prongs 12 and 13 serving to prevent its longitudinal movement. This may be done when it is intended for temporary use, but for permanent association, the lock should be attached to the sash, as shown and described.

The member 10 may be moved to position shown in dotted lines in Fig. 1 when its use is to be temporarily dispensed with.

Having described my invention, what I claim is 1. A sash lock having in combination two elongated plates hinged together at one end, the upper plate having a resilient sharp edge part provided by its salient end to first engage the window frame and a positive abutment to subsequently engage the frame when effort is made to raise the sash, said uplper plate being bifurcated at its free end to permit passage of the sash cord and to provide two prongs, bent at an angle to the plate, the eXtreme ends of the prongs being bent outwardly to form the yielding sharp edges and a knee of the bend affording a positive abutment which engages the frame only after the prongs have been flexed.

2. As an article of manufacture, a sash lock comprising two members hinged together, one being adapted to be positioned on the top of a sash and having its ends bifurcated to receive the sash cord, said bifuroated ends being bent downwardly over the side edge of the sash, the second member being longer than the rst member and adapted to extend toward the frame and having its ends bifureated to embrace the sash cords, the prongs formed by said bifurcations being bent at an acute angle to the main body of the member to form an but-` ment and the ends of said prongs being bent Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

outwardly so as to form engaging edges 10 In testimony whereof I hereunto subscribe 15 my neme.y

WILLIAM H. MONROE.

Washington, D. C. 

